Partition of mold-flasks.



No. 701,330. Patented lune l0, I902.

H. w. BELL. .PARTITlON FOR. "OLD FLASKSQ (Application med Jan. 31, 1902.)

(No Indol.)

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MGM 7 .3 1/7 UNIT D STATES P TENT ()FFICE.

HARRY WV. BELL, OF NEW YORK, N. Y.

PARTITION FOR MOLD-FLASKS.

SPECIFICATION forming part of Letters Patent No. 701,830, dated June 10, 1902.

Application filed January 31, 1902. Serial No. 91,962. (No model.)

To crlZ whom it may concern.-

Be it known that I, HARRY W. BELL, a citi zen of the United States, residing in New.

'meansof what may be termed division-V boards or partitions, but considerable difficulty has been encountered hitherto in the use of such structures, dueto the adherence of the plastic or similar material to the sides or surfaces of the partitions, and which either prevents removal of the bricks or blocks from the fiaskaltogether or else results in their mutilation or breakage.

The object of the present invention is to overcome the objections and difliculties above pointed out and'to provide a mold-flask in which the division-boards or partitions thereof may be released (Jr stripped from the molded bricks or blocks without impairment of the partitions and in a manner to leave the molded articles in an intact form or condition.

A further object is to provide adivisionboard or partition for the purpose named which is simple in construction, easily and quickly manipulated or handled, and one also which may be manufactured at small cost and which is so constructed as to give practically unlimited service in the particular use for which the same is intended.

Other objects will also more fully appear from the following description when taken in connection with the accompanying drawings herein. I V

Figure 1 is a viewin perspective of a division-board or partition for brick and similar mold-flasks,illustrating my invention; and Fig. 2 is a sectional plan view of a mold-flask in which is organized a number or series of my improveddivision-boards or partitions set up to constitute a number of spaces for the molding of bricks orblocks. Fig. 3 is an enlarged transverse sectional View of one of my the division board or partition may be stripped or peeled from the side of the adhering block or brick by first starting the same at one edge by the insertion thereunder of the end of a pinch-bar or similar implement. Fig. 5 is a detail view in perspective of a part of the frame which holds the facing in place.

Before proceeding with a more detailed description it may be stated that in carrying my invention into effect I construct my improved mold-flask of the desired shape and dimensions, and on one or both sides of each of the division-boardsor partitions thereof I apply a facing of some suitable relatively thin and flexible material, such as thin sheet metal, which facing is securelyattached or secured to the board or partition in such man= ner as to leave a considerable area or areas thereof free or unattached',as will hereinafter he understood. The construction and organization are such that the line of separa tion of the surfaces of the facing and molded block gradually changes with each increment of force applied to detach the division-board or partition from the block, and adherence of the materialof the block to the facing tends to pullthe latter from its support (board or other structure) on similarly-changing lines;

but this tendency is overcome, as will presently appear, and the mechanical separation ,of the board or partition from the molded brick or block is effected practically by peeling or stripping thefacing therefrom, leaving the molded article perfectly intact and the division board or partition'ready again for immediate use. -As the separation of the facing from the surface of the block takes place the said facing of .its own tendency is restored to contact with its support to an extent gradually increasing with the increase of area of the separated surfaces. In other words, as the division-board or partition is drawn away from the side of the molded block ICO the facing is gradually drawn outwardly from its support, as already mentioned; but as fastas the facing leaves the surface of the block the separated portions thereof spring back against the side of said support. A peculiar cooperation thus takes place between the facing and block itself, which could not be effected if said faoings were of other than a relatively thin and flexible material, as herein called for. It should be remarked that my improved division-board or partition is intended more especially for use in molds for the formation of composite building-blocks of considerable size as compared with ordinary brick for building or other purposes; hence the advantages of my improvements. Resistance to separation of the facings from the division-board or partition is effected by the means at the edges which hold said facings in position, and the opposite tendency established thereby also aids in the ready separation of said board or partition from the molded article.

The device herein indicated as illustrative of my invention is most effective in use, and possesses many advantages in plants or establishments wherein the manufacture of bricks or blocks of the kind referred to is carried out on alarge scale, and more rapid progress may be made therewith than with many other structures hitherto devised for a similar purpose.

Specific reference being had to the accompanying drawings, A represents a mold-flask constructed and organized in accordance with my invention, and A the division-boards or partitions thereof, comprising a body piece or section consisting, preferably, of an ordinary wooden board or similarstructure a of proper shape and dimensions and having at one or both (preferably both) sides thereof suitable facings b of any suitable relatively thin and flexible materialsuch, for instance, as thin sheet metalwhich facings completely cover the sides of said board and are held in contact therewith, as presently to be described. I may employ different kinds of sheet metals for the facings-such as tin, galvanized iron, zinc, or ordinary sheet-iron-since for some kinds of materials or substances to be molded it may be found that one particular metal may be better adapted than another (on account of the peculiar texture or surface structure thereof) in that the extent or degree of adherence of the substance or material thereto may be considerably less. I may also sometimes employ other materials than sheet metal for the facings, but owing to the cheapness of the latter, as well as the readiness with which it may be procured, I prefer to employ the same. The said facings b are held in contact with-the sides of the board or other structure a in any suitable way, and for which purpose I preferably employ means at the edges of the partition comprising aframe B, made up into sections 6, corresponding to the longer and 1 shorter edges thereof, and which sections are constructed with beveled ends f, so as to accurately fit together when properly fastened in place. The said frame is also preferably of metal, and is bent so as to embrace the edges of the division-board or partition by which to hold the facings in position by the clamping pressure thereof, and preferably I solder the edges of said frame at g to the facings, so as to prevent the same from working loose or coming off in the handling of the partition. In some instances, however, I may dispense with such solder and rely entirely upon the tight fitting of the frame, or I may secure the facings in place by ordinary nails or rivets. I may also sometimes employ frame-sections eitherat the longer or shorter edges only of the partition, but for the purpose of a more equal or uniform resistance to the pulling action exerted by the adhering material I preferably provide them on all four edges. It should be explained that after the brick or block A has been molded and it is desired to remove the same from the flask the division-board or partition on one or both sides thereof must first be separated or removed from the side of the molded article, and to do this the said division-board or partition is not drawn away bodily, (since such action would tend to mutilate or destroy the form of the article;) but the same is turned outwardly from one edge or the other, as indicated in dotted lines, Fig. 2, for instance, the separation from the molded article being effected gradually from the edge substantially in the manner of stripping or peeling off the same, and the article is thus left intact while the surfaces of the facings remain practically clean or free of adhering substances or material. To peel or strip the partitions from the blocks in the mannerjust described, it should be remarked that the sides a a of the mold-flask A are first removed. The same result may also be accomplished by turning the division-board or partition outwardly and downwardly in a gradual manner from the upper end thereof in similar manner. After removal of the molded bricks or blocks the division-boards or partitions may be immediately replaced in position and the operation repeated over and over again indefinitely and in a comparatively rapid manner.

Fig. at perhaps indicates more clearly how the facing of the division-board or partition is peeled off or separated from the adhering block, and wherein a pinch-bar B is shown as inserted or applied under the edge of the partition, and the leverage thus obtained operates to first lift the said partition at the edge, whereupon by continued operation of said bar the facing of the partition gradually leaves or separates from the block, substantially as indicated at 24, Fig. 4. The operation is the same whether the said divisionboard or partition be an inner 01' outer part of the mold-flask. As also shown in Fig. 4,

the line of separation gradually passes along the surface of the block, so that at any one point during the work of removing the partition such separation is restricted to a comparatively small area. By this means I reduce the aggregate amount of stress applied to the block, and thus am able to remove or detach the division-boards or partitions in a free and easy manner without breaking the blocks. I am thus enabled to furnish a rigid mold-flask adapted to sustain comparatively high pressures, and yet secure in such a structure a capacity of separation of the divisionboards or partitions-from the molded article, which is particularly effective in the making of building-blocks and others of a like character in which by means heretofore employed great loss from breaka e has occurred.

It will be understood that in lieu of the overlapping frame B, I may use or employ simple clamps for holding the facings in position against the sides of the board or simi lar structure a; butI prefer the construction which I have herein illustrated on account of its simplicity and the ease and facility with which the same may be applied and secured by the use of simple tools.

While I have herein illustrated a selected type of device or structure as illustrative of my invention, I do not wish to be understood as limiting myself thereto in any respect whatever, since in practice various changes may be made in the general construction and organization of the elements thereof and still be within the spirit and scope of my invention.

In constructing the mold or flask, as in Fig. 2, the longer sides thereof are disposed in vertical planes as are also the divisionboards or partitions, of course, so that more space is economized than if said parts were organized to extend horizontally. Therefore in said Fig. 2 the division-boards or partitions may be said to be standingon end. It may also be stated that I sometimes provide the sides of the mold or flask with a similar facing b of relatively thin flexible material, as sheet metal, the same covering those parts of the inner surfaces of such sides lying between the grooves 11 therein which receive the edges of the partitions to support them during the molding operation, and thus the term division-board or partition herein employed is intended also to apply equally as well to both the side portions and bottom portion of the mold-flask.

, I-Iaving described my invention, I claim 1. A division-board or partition for molds for building-blocks, comprising a structure provided with a facing of relatively thin and flexible material the greater area of which is free or unattached and possesses the capacity to be peeled from the surface of the molded block, said facing also having attached areas, whereby the facing is caused to restore itself to the side of said structure as the partition is drawn away from the block.

2. A division-board or partition for molds for building-blocks, comprising a structure provided with a facing of relatively thin and flexible sheet metal the greater area of which is free or unattached, and possesses the capacity to be peeled from the surface of the molded block,said facing also having attached areas, whereby the facing is caused to gradually restore itself to the side of said structure as the partition is drawn away from the block.

3. A division-board or partition for molds for buildingblocks, comprising a structure provided with a facing of relatively thin and flexible material, and means clamping the facing to the structure at the edges, said facing having the capacity to be peeled from the surface of the molded block on separation of the partition from the block.

4. A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with a facing of sheet metal, and means independent of the side pieces of the flask also of metal holding the facing in place and soldered thereto.

5. A partition for molds for plastic blocks, comprising a structure provided with a facing having the capacity to be drawn outwardly from said structure by adhesion of the material of the-block thereto, on separation of the partition from the block, and to peel from the surface of the block ongradually-changing lines; and means securing said facing to the partition at portions only thereof whereby the unsecured areas or portions are caused to restore themselves to the side of the structure on similarly-changing lines with each increment of force applied to separate the partition from the block.

6. A partition for molds for plastic blocks, comprising a structure provided Witha facing of relatively thin and flexible sheet me'talhaving the capacity to be drawn outwardly from said structure by adhesion of the material of the block thereto, on separation of the partition from the block, and also to peel from the surface of the block on gradually-changing lines; and means securing said facing to the partition at portions only thereof,whereby the unsecured areas or portions are caused to gradually restore themselves to the side of the structure on similarlychanging lines with each increment of force applied to separate the partition from the block.

-7. .A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with afacing of sheet metal, and means also of metal clamping the facing in place and soldered thereto.

for brick and similar molds. comprising a board or similar structure provided with a fac ing, and a frame of metal independent of the side pieces of the flask clamping the facing in place.

10. A division-board or partition for flasks for brick and similar molds comprising a board or similarstructure provided with a facing of sheet metal, and a frame independent of the side pieces of the flask for holding said facing in place.

11. A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with a facing of sheet metal, and a frame also of metal and independent of the side pieces of the flask for holding the facing in place.

12. A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with a facing, and a frame independent of the side pieces of the flask joined to the facing and holding the same in place.

13. A division-board or partition for flasks for brick and similar molds comprising a board orsimilar structure provided with a facing, and a metallic frame independent of the side pieces of the flask joined to said facing and holding the same in place..

14. A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with a facing of sheet metal, and a frame independent of the side pieces of the flask and joined to said facing and holding the same in place.

.15. A division-board or partition. for flasks for brick and similar molds comprising a board or similar structure provided with a facing of sheet metal, and a frame also of metal independent of the side pieces of the flask and joined to said facingand holding the same in place.

16. A division-board or partition for flasks for brick and similar molds comprising a board orsimilar structure provided wi th a facingof sheet metal, and a frame also of metal soldered to said facing and holding the same in place.

17. A division-board or partition for flasks for brick and similar molds comprising a board or similar structure provided with a facing on either side thereof, and a frame bent to embrace the structure at the edges to hold the facings in place against the board, said frame being united along its edges to the faclngs.

18. A mold for building-blocks, comprising detachably-connected side portions and division-boards or partitions forming moldspaces, each of said portions and partitions being provided with a facing of relatively thin and flexible material the greater area of which is free or unattached and possesses the capacity to be peeled from the surface of the molded block, said facings each also having attached areas whereby the facing is caused to gradually restore itself to the side of its support on drawing said portions and partitions away from the block.

19. Arnold for building-blocks, comprising side portions having corresponding grooves at intervalsof the inner surfaces thereof, and division-boards or partitions with their ends detachably fitting the grooves to form moldspaces, each of said portions and partitions being provided with a facing of relatively thin and flexible material the greater area of which is free or unattached and possesses the capacity to be peeled from the surface of the molded block, said facings each also having attached areas whereby the facing is caused to gradually restore itself to the side of its support on drawing said portions and partitions away from the block.

HARRY W. BELL. \Vitnesses:

FRED. J. DOLE, JOHN 0. SEIFER'I. 

